Wiring diagram for Jackaroo

Are the three wires comming out of the sender Black, Blue yellow, & Blue Green? then change to Black Green, Orange, & White on the transmission top kick panel. I think this is what it is on the petrol version. Maybe Savvas can confirm this. But it will only be petrol config he can confirm.

Hope this helps.

Cheers

Jackablue

Thanks for that can you tell me which wire is the actual signal wire which would go to the speedo?

Bob,
I have an Isuzu workshop manual for '92 & '93 Jackaroos.
Although ours is a '97 petrol, I haven't found anything yet that isn't covered, except that the dashboard switches are different.
The circuits are the same, but the switches themselves are a rotary type, whereas ours are rockers.
Hopefully it covers your '95, but I can't be certain.

According to the book, for a '93 Diesel, the plug on the speed sensor on the gearbox has three wires connected to it.
Pin 1: +12v to the sensor from a switched fuse labelled "Meter gauge".
The wire colour is blue/yellow from the fusebox, but changes to yellow at the sensor plug.
Pin 2: Connected to earth.
The wire colour is black at the sensor plug, but changes to black/red at the earth point behind the RH mudguard.
Pin 3: Connected to the speedo.
The wire colour code is a bit hard to read.
It's either blue/green/white or light green/white.

The speed sensor transmits four pulses for each rev of the input shaft

There is a test procedure for the sensor.
You will need a 12v supply. A car battery will suffice.

1/ Unplug the sensor, and then remove it from the gearbox by unscrewing it.
2/ Connect + 12v to pin 1.
3/ Connect – 12v to pin 2.
4/ Connect a 1.3kΏ – 5kΏ ¼W or more resistor between pins 1 and 3.
Take care not to connect +12v to pin 3.
The sensor may be damaged if you do.
5/ Connect a voltmeter to pins 1 and 3.
6/ Slowly rotate the shaft of the sensor.
Each revolution of the shaft should cause the voltage to fluctuate four times between approx 10v and 14v.
There is a +/- 2v tolerance on these figures.

When you reinstall the sensor, it should be torqued to 27Nm.

I hope all of this is of some help.

Cheers,
Trev